A library is not a luxury but one of the necessities of life.

The things required for prosperous labor, prosperous manufactures, and prosperous commerce are three. First, liberty; second, liberty; third, liberty.

Precise knowledge is the only true knowledge, and he who does not teach exactly, does not teach at all.

In engineering, that only is great which achieves. It matters not what the intention is, he who in the day of battle is not victorious is not saved by his intention.

Work is not a curse, but drudgery is.

A grindstone that had not grit in it, how long would it take to sharpen an ax? And affairs that had not grit in them, how long would they take to make a man?

Many of our troubles are God dragging us, and they would end if we would stand upon our feet and go whither He would have us go.